1087057789 has 4 divisors (see below), whose sum is σ = 1088422524. Its totient is φ = 1085693056.

The previous prime is 1087057753. The next prime is 1087057799. The reversal of 1087057789 is 9877507801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 705168025 + 381889764 = 26555^2 + 19542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1087057789 - 2⁹ = 1087057277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1087057709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681172 + ... + 682765.

It is an arithmetic number, because the mean of its divisors is an integer number (272105631).

Almost surely, 2^1087057789 is an apocalyptic number.

It is an amenable number.

1087057789 is a deficient number, since it is larger than the sum of its proper divisors (1364735).

1087057789 is an equidigital number, since it uses as much as digits as its factorization.

1087057789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364734.

The product of its (nonzero) digits is 987840, while the sum is 52.

The square root of 1087057789 is about 32970.5594280716. The cubic root of 1087057789 is about 1028.2156522575.

The spelling of 1087057789 in words is "one billion, eighty-seven million, fifty-seven thousand, seven hundred eighty-nine".